BoxAnimated.gltf doesn't animate correctly

[sakrist]

Here is model:
https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/BoxAnimated

[donmccurdy]

Previewing the model at this URL:

https://gltf-viewer.donmccurdy.com/#model=https://raw.githubusercontent.com/KhronosGroup/glTF-Sample-Models/master/2.0/BoxAnimated/glTF/BoxAnimated.gltf

... if you press the "Animation -> playAll" button, it will play both animations together, correctly. By default the viewer plays only the first animation — it is an error in the sample models that they contain many animation clips meant to be treated as one.

[sakrist]

Oh my ... (read issue you pointed at)....

If I press play all animations, they still play incorrectly.

[donmccurdy]

Incorrectly in what way?

[sakrist]

they play independently, and then don't match same timeline.
Or it's feature?

[donmccurdy]

Hm you're right. The movement and rotation of the purple box shouldn't be two separate clips, per the issue above, but they are and unfortunately the lengths of those two tracks are different:

So, it's probably a further bug in the model itself. Maybe even in the COLLADA file this glTF was created from, but I suspect just the glTF conversion. The playback is also broken in BabylonJS's viewer, in the same way: http://sandbox.babylonjs.com/

I've filed an issue on the sample models repo, here: KhronosGroup/glTF-Sample-Models#126